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3.1.5. Auto-Generated Address Objects
To simplify the configuration, a number of address objects in the address book are automatically
created by NetDefendOS when the system starts for the first time and these objects are used in
various parts of the initial configuration.
The following address objects are auto-generated:
Interface Addresses
For each Ethernet interface in the system, two IP Address objects are
predefined; one object for the IP address of the actual interface, and
one object representing the local network for that interface.
Interface IP address objects are named <interface-name>_ip and
network objects are named <interface-name>_net. As an example,
an interface named lan will have an associated interface IP object
named lan_ip, and a network object named lannet.
Default Gateway
An IP Address object named wan_gw is auto-generated and
represents the default gateway of the system. The wan_gw object is
used primarily by the routing table, but is also used by the DHCP
client subsystem to store gateway address information acquired from
a DHCP server. If a default gateway address has been provided
during the setup phase, the wan_gw object will contain that address.
Otherwise, the object will be left empty (in other words, the IP
address will be 0.0.0.0/0).
all-nets
The all-nets IP address object is initialized to the IP address
0.0.0.0/0, which represents all possible IP addresses. The all-nets IP
object is used extensively in the configuration of NetDefendOS and it
is important to understand its significance.
3.1.6. Address Book Folders
In order to help organise large numbers of entries in the address book, it is possible to create address
book folders. These folders are just like a folder in a computer's file system. They are created with a
given name and can then be used to contain all the IP address objects that are related together as a
group.
Using folders is simply a way for the administrator to conveniently divide up address book entries
and no special properties are given to entries in different folders. NetDefendOS continues to see all
entries as though they were in large table of IP address objects.
The folder concept is also used by NetDefendOS in other contexts such as IP rule sets, where related
IP rules can be grouped together in administrator created folders.
3.1.6. Address Book Folders Chapter 3. Fundamentals
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